A0-4318: rate-limiter for all (#1857)

# Description

Implementation of a shared-bandwidth rate-limiter for both
substrate-based and alephbft networks.
In a next PR I will introduce a new e2e-test that should help to verify
these changes.

## Type of change

- New feature (non-breaking change which adds functionality)

# Checklist:

<!-- delete when not applicable to your PR -->

- I have added tests
- I have made corresponding changes to the existing documentation
- I have created new documentation

.github/workflows/_check-runtime-metadata.yml

@@ -44,7 +44,7 @@ jobs:
         shell: bash
         run: |
           # same version as in aleph-client's Cargo.toml
-          cargo install subxt-cli --version 0.30.1
+          cargo install subxt-cli --version 0.30.1 --locked
 
       - name: Get subxt-cli path
         id: get-subxt-path